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SIP-56: Better foundations for match types#18262

Merged

sjrd merged 17 commits intoscala:mainscala/scala3:mainfrom dotty-staging:better-foundations-for-match-typesdotty-staging/dotty:better-foundations-for-match-typesCopy head branch name to clipboard

Dec 18, 2023

+1,670-290

Conversation Commits17 (17)Checks Files changed

Commits

Commits on Dec 18, 2023

Introduce MatchTypeCaseSpec to categorize match type cases.
sjrd
committed
Use new specced match types for class type constructors.
sjrd
committed
Use new specced match types for scala.compiletime.int.S[n].
sjrd
committed
Short-circuit match type cases with missing captures in their patterns.
sjrd
committed
Use the specced match types for abstract tycons in patterns.
sjrd
committed
Handle type member extractors as specced match types.
sjrd
committed
Report a compile error on illegal match types.
sjrd
committed
Allow to reduce type member extractors when the member is a class.
sjrd
committed
New implementation of provablyDisjoint to match SIP-56.
sjrd
committed
Be more specific about higher-kinded types in provablyDisjoint.
sjrd
committed
Do not use provablyEmpty anymore; use S <: T + provablyDisjoint(S, T) instead.
sjrd
committed
Add regression tests for old issues fixed with the new match types.
sjrd
committed
Under -source:3.3 and below, always use the legacy match type algorithm.
sjrd
committed
In type assigner for Apply, carry ErrorType's from the fn.
sjrd
committed
Fix 1 cause of infinite recursion in the new provablyDisjoint.
sjrd
committed
Demonstrate more potential unsoundness with a CCE reproducer.
sjrd
committed
Add comments that link to relevant parts of the spec of SIP-56.
sjrd
committed

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